As a matter of fact, we do not have (and cannot have) full information about the “motives, capacities, etc.” concerning other humans, but it does not stop us from making - tentative - value judgments. We go by the
available information and employ the “duck principle”, in other words we go by the
appearances - knowing fully well, that we might be mistaken. But as long as we are prepared to modify our hypothesis,
IF and WHEN new information becomes available, we are on the right track.
Precisely, we have sufficient operating information to make pragmatic decisions concerning what is immediately good for ourselves because these typically are tied up in the circumstances that our limited purview can assess. The problem is in applying this limited perspective to God who needs to have a much wider one - the good of all moral agents and their development through all time and who likely has quite a different final end in mind than your 'biological being" ideal. A microscopic view is useless when a telescopic one is necessary.
Trurl:
If you wish to use a different procedure for God, then you are guilty of special pleading. If you go by the available information and the appearance, then God MUST be condemned - because according to the available hard information - which is NONEXISTENT and going by the appearances, God is at best: indifferent, at worst: malevolent.
To insist the same lens will suffice in both situations is myopic at best, especially if you define the “good” by only the information available to your myopic view. A patient insisting to their doctor that they only need rest and an aspirin when the doctor has prescribed quite a different remedy continues at their own peril, no matter how sure the patient feels that they are right and the doctor wrong. The expertise and knowledge of the doctor is warrant for not considering both treatment options equally. It is not “special pleading” to take the side of the doctor. The patient, like you, could very well insist that the expertise of the doctor (omniscience) is not needed in making the diagnosis or setting the course of treatment, but they’d be wrong.
And no “omniscience” needed, but one MUST be prepared to modify and/or discard this hypothesis, IF new information becomes available. Fat chance of that…
We can well imagine a stubborn patient saying exactly this. From their point of view they have enough evidence to make an informed decision. The doctor’s knowledge is unnecessary. There would be a fat chance of the patient changing their mind precisely because they are entrenched in the belief that there is a fat chance of the doctor or anyone else having information they do not have or knowing more than they do.